Water cooled cupola



April 15, 1941. J c u s 2.238.036

WATER COOL-ED CUPOLA Filed July 3, 1939 "3 Sheets-Sheet 2 Ihwentor 6 (Ittorneg j Walonlecl Apr. 15, 1941 wn'rnrt oooLnn corona Joshua K. Elutts, Detroit, Mich. Application July 3, 1939, Serial No. 282,639

Claims.

'lhis invention relates to foundry cupolas and particularly to provisions for cooling such cupolas in use.

lih'ebrick as a lining for cupolas is subject to very rapid deterioration as the result of extremely high temperatures together with heavy wear. Water-cooled metal linings, because of their far superior durability, have to some extent superseded firebrick.

An object of the present invention is to form a a unit a furnace wall liner and a tuyere cooler, having a single circulatory system for coolant water.

Another object is to provide an improved ballle arrangement for establishing a desired coolant flow through such a unit.

Another object is to render such a unit effective to cool a plurality of adjacent tuyeres.

A further object is to dispose the cooled tuyres in a set back relation to the unit such as to afford them a maximum protection from heat and wear. 7

A further object is to utilize a cooling unit as one of the walls of a separately formed tuyere.

These and various other objects are attained by upper set of tuyeres l, 5 and a lower set of larger tuyre cooler, the cooler and the liner both being hollow and water conducting. A circular series of these units, occupying a slightly spaced relation, extends around the cupola at its melting zone, conforming to the curvature of its wall, the

liners 9 defining said melting zone and being spaced from the shell I by a portion of the firebrick lining'2. The spaces between the units are filled with broken firebrick or other suitable refractory material 9a. The tuyere cooler of each unit extends outwardly from the lower end of the liner 9 of such unit, terminating at the shell.

the construction hereinafter described and illus-- trated in the accompanying drawings, wherein:

Fig. l is a fragmentary interior elevational view of a foundry cupola equipped with the improved cooling units.

Fig. 2 is a horizontal sectional view of the cupola, taken on the line 2-2 of Fig. 1.

Fig. :i is another horizontal sectional view, talren on the line 3-3 of Fig. i.

Fig. i is a radial sectional view taken on the line ti -ll oil his. 2.

- An arched opening Ill is formed in the lower end of each unit to accommodate one of the tuyres 4, 5, such opening interrupting the bottom face of the unit and extending from the outer end of the tuyere cooler to the inner face of the liner 9. The tuyere thus housed within each unit occupies the mid portion of the opening ll), being set back preferably at least three inches from the inner l ter. 5 is an exterior view of one of the cooling units...

it is a vertical sectional view taken on the line t-t oi his. ll of the tuyere cooling element oi raid unit.

l is a radial sectional view of the lower portion oi? the unit taken on the line "l--l oi l lo. it.

l lg. ii, is another radial section of said portion.

race of the unit so as to be considerably protected from the wear chest andhigh temperature of cupola load. To form the opening In, the tuyre cooler of each unit is arched, midway be tween its radial margins, the walls of this arch ll being hollow and water conducting and communicating with a lateral portion Ila. of the coolor as best appears in Fig. 6. Water under suitable pressure is admitted through a pipe It to the other lateral portion llh or the tuyere cooler at its outer end, and is compelled to flow inwardly through such portion by provision of a partition It closing of]? such portion from the arch (Fig. 6)

As disclosed by Fig. 8, this partition terminates at the inner wall of the liner 9, whereby the water may flow around the inner end of said partition through a chamber I30. (Fig. 8) in the liner and may be delivered forwardly into a leg of the arch through an opening lib in the outer Wall of the liner. The chamber lid is partitioned on from theoverlying space in the liner as indicated at its, The water now flows through the bridge wall and other leg oi the arch into the lateral portion llo' of the tuyre cooler and discharges finally into. the liner 9 through an opening iii in the outer wall of the liner. Confined by the lowermost of a series of vertically spaced bafiiea iii in the liner, the water now flows over the arched opening l and circuitously ascends in the liner through waterways formed between said bames. A circuitous flow is assured by terminating alternate battles in spaced relation to opposite radial walls of the liner 8, as best appears in Fig. 5, so that water flows the length of each waterway before rising into the overlying waterway, wherein a reversed flow occurs. A pipe it serves to disdiarge water from the upper end portion of each liner 8.

The lower tuyeres form seats for the cooling units, each such tuyere having its radial axis underlying the space between two adjacent units. Similarly to the upper tuyeres, each lower tuyere has its outer U-shaped section 8 extending in wardiy from the shell, and its outer box-shaped section I extending some distance into the outer section, the section I extending toward the melting zone several inches beyond the section 6 and terminating preferably at least three inches from such zone. Thus similarly to the upper tuyeres, the lower ones are protected from the cutting action and high temperature of the cupola load.

Preferably each cooling unit is formed at the lower end of the liner 9 with a hollow ledge 11 interiorly communicating with the water space of the unit and projecting sufficiently into the cupola chamber to serve as a support for a temporary facing of firebrick or the like, to be applied preliminary to each heat.

It will appear from the foregoing description that the tuyere cooling members of the described units not only extend in close heat-absorbing proximity to the tuyeres, but serve to a very material extent to form the air passages. Thus the U-shaped outer sect-ions of both the upper and lower tuyeres are roofed by the coolers 8, and the manner in which both sets of tuyeres are set back from the cupola chamber imposes on the units the function of largely forming the discharge end portions of the air passageways.

Very eflicient protection of the tuyeres results from thus setting them back within or beneath the cooling units, it being equally feasible to deliver either cold or heated air to the tuyeres without affecting their protection. There accrues the advantage that the tuyres require replacement far less frequently than in present practice.

Formation of a water cooled wail liner and tuyere cooler as a single unit simplifies both the cdnstruction and installation of these elements as compared to the employment of such elements separately formed, and also materially simplifies the delivery and discharge'of water to and from aaeaoso such elements. Also a maximum conductivity of heat between said elements is attained by their formation as a single unit.-

The tuyeres illustrated and described are of a sectional form that avoids necessity for discarding an entire tuyere when its portion adjacent the melting zone becomes unduly. deteriorated. It is apparent, however, that the described unit is not limited in its application to any particular type of tuyre but it is preferred to employ tuyeres of a nozzle type, such as progressively impose increasing velocity on delivered air.

The invention is presented as including all such modifications and changes as come within the scope of the following claims.

What I claim is:

1. In a cupola, the combination with a tuyere installed in the cupola wall and delivering air to the cupola, of a tuyere cooler formed with a passage for a coolant fluid and arched to form an opening receiving said tuyere, and a pair of tuyeres installed in said wall at a lower level than the first mentioned tuyre and jointly providing a seat for the tuyere cooler.

2. A cupola as set forth in claim 1, the two lower tuyeres being at least partially opentopped and the tuyere cooler forming a closure forsuch tops.

3. In a cupola, the combination with a vertically elongated cooler for the wall of said cupola and a tuyere cooler connected to the lower end portion of the wall cooler and outwardly projecting from the wall cooler, and formed with an opening extending substantially radially through both coolers, the two said coolers being jointly formed with a passage for a coolant fluid, of a tuyere installed in said opening and set back from the inner end of such opening a distance approximately equal to the radial thickness of the wall cooler.

4. In a cupola, the combination with a vertical elongated cooler for the cupola wall, and a tuyere cooler integrally connected to the lower end portion of the wall cooler and outwardly projecting from said end portion and formed with an opening extended substantially radially through both coolers, the two coolers being jointly formed with a passage for a coolant fluid, of a tuyre installed in said opening and delivering air through said wall.

5. In a cupola, a cooling unit for the cupola wall set into said wall substantially flush with an adjacent interior face of the wall, and formed at its bottom with a ledge projecting into the cupola chamber and forming a support for a coating of protective material applied to the inner face of the unit.

JOSHUA K. CLUTTS. 

